1 /**************************************************************** 2 * Licensed to the Apache Software Foundation (ASF) under one * 3 * or more contributor license agreements. See the NOTICE file * 4 * distributed with this work for additional information * 5 * regarding copyright ownership. The ASF licenses this file * 6 * to you under the Apache License, Version 2.0 (the * 7 * "License"); you may not use this file except in compliance * 8 * with the License. You may obtain a copy of the License at * 9 * * 10 * http://www.apache.org/licenses/LICENSE-2.0 * 11 * * 12 * Unless required by applicable law or agreed to in writing, * 13 * software distributed under the License is distributed on an * 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 15 * KIND, either express or implied. See the License for the * 16 * specific language governing permissions and limitations * 17 * under the License. * 18 ****************************************************************/ 19 20 package org.apache.james.mime4j.field.address; 21 22 import java.util.ArrayList; 23 24 /** 25 * An immutable, random-access list of Strings (that 26 * are supposedly domain names or domain literals). 27 * 28 * 29 */ 30 public class DomainList { 31 private ArrayList<String> domains; 32 33 /** 34 * @param domains An ArrayList that contains only String objects. 35 * @param dontCopy true iff it is not possible for the domains ArrayList to be modified by someone else. 36 */ DomainList(ArrayList<String> domains, boolean dontCopy)37 public DomainList(ArrayList<String> domains, boolean dontCopy) { 38 if (domains != null) 39 this.domains = (dontCopy ? domains : new ArrayList<String>(domains)); 40 else 41 this.domains = new ArrayList<String>(0); 42 } 43 44 /** 45 * The number of elements in this list. 46 */ size()47 public int size() { 48 return domains.size(); 49 } 50 51 /** 52 * Gets the domain name or domain literal at the 53 * specified index. 54 * @throws IndexOutOfBoundsException If index is < 0 or >= size(). 55 */ get(int index)56 public String get(int index) { 57 if (0 > index || size() <= index) 58 throw new IndexOutOfBoundsException(); 59 return domains.get(index); 60 } 61 62 /** 63 * Returns the list of domains formatted as a route 64 * string (not including the trailing ':'). 65 */ toRouteString()66 public String toRouteString() { 67 StringBuffer out = new StringBuffer(); 68 for (int i = 0; i < domains.size(); i++) { 69 out.append("@"); 70 out.append(get(i)); 71 if (i + 1 < domains.size()) 72 out.append(","); 73 } 74 return out.toString(); 75 } 76 } 77